From 9bb75937cc698b32f2fe6ffac3b4e09a89c3c5f7 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Mon, 6 Sep 2010 11:51:42 +0200
Subject: fix += return by value like operations

---
 Eigen/src/Core/SelfCwiseBinaryOp.h | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'Eigen/src/Core/SelfCwiseBinaryOp.h')

diff --git a/Eigen/src/Core/SelfCwiseBinaryOp.h b/Eigen/src/Core/SelfCwiseBinaryOp.h
index 5100f6b25..f77589747 100644
--- a/Eigen/src/Core/SelfCwiseBinaryOp.h
+++ b/Eigen/src/Core/SelfCwiseBinaryOp.h
@@ -62,8 +62,6 @@ template<typename BinaryOp, typename Lhs, typename Rhs> class SelfCwiseBinaryOp
 
     typedef typename ei_packet_traits<Scalar>::type Packet;
 
-    using Base::operator=;
-
     inline SelfCwiseBinaryOp(Lhs& xpr, const BinaryOp& func = BinaryOp()) : m_matrix(xpr), m_functor(func) {}
 
     inline Index rows() const { return m_matrix.rows(); }
@@ -142,6 +140,15 @@ template<typename BinaryOp, typename Lhs, typename Rhs> class SelfCwiseBinaryOp
     #endif
       return *this;
     }
+    
+    // overloaded to honor evaluation of special matrices
+    // maybe another solution would be to not use SelfCwiseBinaryOp
+    // at first...
+    SelfCwiseBinaryOp& operator=(const Rhs& _rhs)
+    {
+      typename ei_nested<Rhs>::type rhs(_rhs);
+      return Base::operator=(rhs);
+    }
 
   protected:
     Lhs& m_matrix;
-- 
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